Blender runs out of memory while rendering fabric hair on GPU
@Wiirexu That simply means that the 2GB of VRAM you have on your GPU is not enough for the scene. If you want to render the scene using your computer's available RAM, you have to render with CPU. If you render with CPU and there is still not enough memory, your only options are to get more RAM, or use a render farm.

You do not have enough VRAM available on your GPU for rendering the scene you are trying to render. Your only other options are: 

You could try reducing the amount of geometry in your scene using the decimate modifier.

You could switch to CPU rendering. This will render your scene using your available RAM, instead of VRAM.
(If you render with CPU and there still isn't enough memory, you will need to add more RAM to your system.)

You could use a renderfarm service, such as SheepIt! (Free)

You could upgrade your current GPU or add another to your system.

You could ask someone to render it for you (I'd probably be willing, I've got 6GB of VRAM)